<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<%
    String path2 = request.getContextPath();
%>
<ul class="nav navbar-nav navbar-right">
    <li><a href="<%=path2%>/mainUrl">主页</a></li>
    <li><a href="<%=path2%>/introduceUrl">说明</a></li>
    <li><a href="<%=path2%>/logoutUrl">注销登录</a></li>
</ul>